iOS 7's Per App data usage feature...

This is definitely in the top 5 new features that I am looking forward to (this pic isn't mine, it was snagged from a Reddit post)...

...anyone that is getting use out of this, are there any apps that are just full out data hogs that you wouldn't have guessed used so much before seeing it broken down? I know Android users have enjoyed this function for a while so I'm certainly glad iOS is finally getting it.

Now if we could only get a break down on battery % usage in the same fashion.